Watch an Excellent Neil deGrasse Tyson Rant About Alien Life

Neil deGrasse Tyson is the go-to science explainer for American late-night TV (even though he's gotten his own show), and those appearances typically produce a golden moment of the astrophysicist expounding on the wonders of the universe. No different last night when Tyson appeared on James Corden's "Late Late Show" to take questions from comedian Andy Samberg.

Asked whether humanity is alone, Tyson launches into a monologue that concludes it would be "inexcusably egocentric" to presume we are alone in such a big and old place as the universe. He concludes at about the two-minute mark, and then proceeds to talk about whether sex with robots is cheating (it depends).